I'm a little late to homeschooling you on the latest radical, Christian-fundamentalist movement, but late is better than being a stay-at-home daughter. It's pretty much what it sounds like: stay-at-home daughters are training to be stay-at-home moms, but more virtuous.
They opt out of education (not until they're legally old enough, I presume) and employment to learn "advanced homemaking" skills, like how to make soap and candles. Odd, because they sound pretty primitive to me! Anyway, their full-time job is securing a husband who pleases themselves, mothers, fathers, and Father, but not in that order. For that epic task, there's How to Evaluate a Suitor: Biblical Wisdom For Fathers, Mothers, Eligible Daughters, and Would-Be Grooms, a two-part audiobook that looks more the cover a Charles Dickens novel than real-world advice.
It's one of many products on Vision Forum, an online store promoting Victorian-era dating rituals, gender stereotypes, and anachronistic etiquette. It's a home base for the Christian Patriarchy Movement, a branch of evangelical Christianity that translates the Bible into extreme gender roles. I'm sure most stay-at-home daughters would say it's their choice, but with books like Before You Meet Prince Charming and The Beauty of Modesty: Cultivating Virtue in the Face of a Vulgar Society, it sounds to me like they're being brainwashed.